#!/usr/bin/env sh

# This is a valid shell script and also a valid Python script. When this file
# is executed as a shell script, it finds a python binary and executes this
# file as a Python script, passing along all of the command line arguments.
# When this file is executed as a Python script, it loads and runs Dotbot. This
# is useful because we don't know the name of the python binary.

''':' # begin python string; this line is interpreted by the shell as `:`
command -v python  >/dev/null 2>&1 && exec python  "$0" "$@"
command -v python3 >/dev/null 2>&1 && exec python3 "$0" "$@"
command -v python2 >/dev/null 2>&1 && exec python2 "$0" "$@"
>&2 echo "error: cannot find python"
exit 1
'''

# python code

import sys, os

PROJECT_ROOT_DIRECTORY = os.path.dirname(
    os.path.dirname(os.path.realpath(__file__)))

def inject(lib_path):
    path = os.path.join(PROJECT_ROOT_DIRECTORY, 'lib', lib_path)
    sys.path.insert(0, path)

# version dependent libraries
if sys.version_info[0] >= 3:
    inject('pyyaml/lib3')
else:
    inject('pyyaml/lib')

if os.path.exists(os.path.join(PROJECT_ROOT_DIRECTORY, 'dotbot')):
    if PROJECT_ROOT_DIRECTORY not in sys.path:
        sys.path.insert(0, PROJECT_ROOT_DIRECTORY)
        os.putenv('PYTHONPATH', PROJECT_ROOT_DIRECTORY)

import dotbot

def main():
    dotbot.cli.main()

if __name__ == '__main__':
    main()